docker cannot find the Docker image for LTS 16.31.

General summary/comments (optional)
stack --docker cannot find the Docker image for LTS 16.31.

Steps to reproduce
Create a new Stack project:
stack new test-docker
cd test-docker
Edit stack.yaml to say:
resolver: lts-16.31
packages:
- .
Run:
stack --docker build
Expected
Dockerized build of a fresh package.

Actual
```
Pulling image from registry: 'fpco/stack-build:lts-16.31'
fork/exec /usr/local/bin/com.docker.cli: bad file descriptor
Could not pull Docker image:
fpco/stack-build:lts-16.31
There may not be an image on the registry for your resolver's LTS version in
your configuration file.
```

Stack version
$ stack --version
Version 2.5.1, Git revision d6ab861544918185236cf826cb2028abb266d6d5 x86_64 hpack-0.33.0
Method of installation
Official binary, downloaded from stackage.org or fpcomplete's package repository